You could use a ceramic resonator but you might need a different circuit.

Either of the crystals you mention will work. However as mentioned by
another poster 3.6864 isn't in the CW part of the band. Personally to avoid
dissappointment I'd advise against 3.579 too: there isn't much activity
there. 3.560 is the standard QRP calling frequency and there's plenty of
activity there. You can get 3.560 crystals, try
http://www.jabdog.com/crystals.htm amongst others.

Alternatively you can get use a 3.579 crystal and modify it down to 3.560.
See this page on my web site for details
http://www.hanssummers.com/radio/penning/index.htm.

Hans G0UPL





"Chris" wrote in message
...
This is my first visit to this newsgroup...I am a new MI3.

I would like to put together a very simple QRP CW transceiver. The
schematic
I am using includes a 3.560MHz crystal oscillator.

Maplin's, Farnell etc. sell 3.579545MHz or 3.686400MHZ crystal oscillators
respectively and I am wodering will these do the job or should I be
looking
for a 3.560MHz crstal? The circuit does have a 65pF trimmer capacitor for
tuning but I want to sure about the crystal before I order.

Thanks for your help.

Chris

I would like to put together a very simple QRP CW transceiver. The schematic
I am using includes a 3.560MHz crystal oscillator.

Maplin's, Farnell etc. sell 3.579545MHz or 3.686400MHZ crystal oscillators
respectively and I am wodering will these do the job or should I be looking
for a 3.560MHz crstal? The circuit does have a 65pF trimmer capacitor for
tuning but I want to sure about the crystal before I order.

Chris-

I suggest you get a collection of crystals. I don't think you want a custom
oscillator module unless it offers the option of changing crystals.

You should be able to find an inexpensive 3.579545 MHz "colorburst" crystal at
Radio Shack. Your 65 pF capacitor may not quite pull it down to 3.560, but it
might. Try it and see how it works.

Are there any upcoming hamfests in your area? There was one this weekend
Shelby, NC. In a couple more there is one in Melbourne, FL. These are usually
good sources for miscellaneous crystals.

73, Fred, K4DII

I would like to put together a very simple QRP CW transceiver. The schematic
I am using includes a 3.560MHz crystal oscillator.

Maplin's, Farnell etc. sell 3.579545MHz or 3.686400MHZ crystal oscillators
respectively and I am wodering will these do the job or should I be looking
for a 3.560MHz crstal? The circuit does have a 65pF trimmer capacitor for
tuning but I want to sure about the crystal before I order.

Chris-

I suggest you get a collection of crystals. I don't think you want a custom
oscillator module unless it offers the option of changing crystals.

You should be able to find an inexpensive 3.579545 MHz "colorburst" crystal at
Radio Shack. Your 65 pF capacitor may not quite pull it down to 3.560, but it
might. Try it and see how it works.

Are there any upcoming hamfests in your area? There was one this weekend
Shelby, NC. In a couple more there is one in Melbourne, FL. These are usually
good sources for miscellaneous crystals.

73, Fred, K4DII

Chris

I-Q Electronic Design had 3.560 MHz xtals in their advert in the summer
edition of SPRAT the G-QRP club magazine - e-mail
. There are also low power miniature 3.560 xtals
and 3.68 MHz ceramic resonantors in the member sales for the G-QRP club.
www.gqrp.com/ Some sale items are members only but at £6 pa membership is
a bargain and you will get SPRAT magazine which covers just the kind of
simple low power rigs that you are interested in.

Best regards

Mike G3TGD



"Chris" wrote in message
...
This is my first visit to this newsgroup...I am a new MI3.

I would like to put together a very simple QRP CW transceiver. The
schematic
I am using includes a 3.560MHz crystal oscillator.

Maplin's, Farnell etc. sell 3.579545MHz or 3.686400MHZ crystal oscillators
respectively and I am wodering will these do the job or should I be
looking
for a 3.560MHz crstal? The circuit does have a 65pF trimmer capacitor for
tuning but I want to sure about the crystal before I order.

Thanks for your help.

Chris

Chris

I-Q Electronic Design had 3.560 MHz xtals in their advert in the summer
edition of SPRAT the G-QRP club magazine - e-mail
. There are also low power miniature 3.560 xtals
and 3.68 MHz ceramic resonantors in the member sales for the G-QRP club.
www.gqrp.com/ Some sale items are members only but at £6 pa membership is
a bargain and you will get SPRAT magazine which covers just the kind of
simple low power rigs that you are interested in.

Best regards

Mike G3TGD



"Chris" wrote in message
...
This is my first visit to this newsgroup...I am a new MI3.

I would like to put together a very simple QRP CW transceiver. The
schematic
I am using includes a 3.560MHz crystal oscillator.

Maplin's, Farnell etc. sell 3.579545MHz or 3.686400MHZ crystal oscillators
respectively and I am wodering will these do the job or should I be
looking
for a 3.560MHz crstal? The circuit does have a 65pF trimmer capacitor for
tuning but I want to sure about the crystal before I order.

Thanks for your help.

Chris

"Chris" wrote in message
...
This is my first visit to this newsgroup...I am a new MI3.

I would like to put together a very simple QRP CW transceiver. The
schematic
I am using includes a 3.560MHz crystal oscillator.

Maplin's, Farnell etc. sell 3.579545MHz or 3.686400MHZ crystal oscillators
respectively and I am wodering will these do the job or should I be
looking for a 3.560MHz crstal? The circuit does have a 65pF trimmer
capacitor for tuning but I want to sure about the crystal before I
order.

Thanks for your help.

Chris

Chris,

I have a couple of HC-6 package 3.559858 crystals with wire leads instead
of pins. That's 141 Hz below your frequency of interest. I believe these
are parallel-mode, calibrated at 32 pF capacitance. These came from Fair
Radio Sales of Nebraska. Send me your postal address & I'll mail you one.
--

R F Wieland Newark, DE 19711-5323 USA 39.68N 75.74W
Icom R75 Heathkit GR-81 Inverted-L in the attic
Reply to wieland at me dot udel dot edu

"Chris" wrote in message
...
This is my first visit to this newsgroup...I am a new MI3.

I would like to put together a very simple QRP CW transceiver. The
schematic
I am using includes a 3.560MHz crystal oscillator.

Maplin's, Farnell etc. sell 3.579545MHz or 3.686400MHZ crystal oscillators
respectively and I am wodering will these do the job or should I be
looking for a 3.560MHz crstal? The circuit does have a 65pF trimmer
capacitor for tuning but I want to sure about the crystal before I
order.

Thanks for your help.

Chris

Chris,

I have a couple of HC-6 package 3.559858 crystals with wire leads instead
of pins. That's 141 Hz below your frequency of interest. I believe these
are parallel-mode, calibrated at 32 pF capacitance. These came from Fair
Radio Sales of Nebraska. Send me your postal address & I'll mail you one.
--

R F Wieland Newark, DE 19711-5323 USA 39.68N 75.74W
Icom R75 Heathkit GR-81 Inverted-L in the attic
Reply to wieland at me dot udel dot edu